Boring-tool



J.l VAN DER voRN.

BORING TOOL.

APPLICAIION FILEI) MAY 2,'1919.

'1 3505 394, Patented Aug. 24, 1920.

'ssHEETs-SHEET 1.

B I 16 IIIIIIIIAA `J. VAN DER VORN.

BORING TOOL.

l D MAY 2, Isls Patented Aug. 24, 1920.

3 EEEE 'fs-'SHEET 2` f "mm `lll-lum 1. vAN DER v'oRN.

BORING TOOL.

APPLICATION FILED MY 2, 1919.

Patented Aug. 24,1920.

- 3 SHEETS-SHEET 3.

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UNITED, si*Ares,V via'r15.115111" i IQFFIQE,

i JACQBYVVA'NKVDEE voRN, oF CHICAGO,"rLLiNois.` `1 i Y* BORING-TOOL.. v i,

13e vit known that JAooe A a citizen or `the United States, vresidinv at Chicago, in the countyofCook anchstate of lllinois, haveinvented certain new and use'lul improvements in` Boring-Tools, of

Y which rthe following is a' specication.

.25 held in all operative adjustments, simplicity The present.invention relates to boring tools for inetaljworking and especiallyy to c Aboring tools of the "expansion type, wherein the cutter head'oi the tool providediwith means for` readily adji'istiiig" the'V cutters toward and from 'thez airis'y of; the .tool to vary the dianietero thecut. "In certainwasi Y 'iects the invention has todo also with tools l Va Y Y v i tl class in whichthefcutterjhead isfree struction such that thecutterswill be firmly and economy of construction, eiieiency of operation at high,'asfwell fas low, speeds,

and neatness of appearance and finish? f vrllie iiiventio'nwill be Vliest understood Y upon'refe'rence to thefollowing detailed defA Vscription takenfin connection jwithfithe `acfccnipanying drawings, whileY the""scopel of the invention willf'be particularly jpointed out in the appended claims." f'

1 In Vsail drawings, Figure -11 is A-a` perspective view ora boring tool constructed; iii accordance with the present invention,

parts being broken away'an'dshown'in section to more clearly illustrate the "constru OS Fig 2 is an @11d 'VeWf the-tool. Fig.v 3 is a `view', ofthe ,intermediate-mein-j ber located between tlie'shankand thel cut-V ter head, associated parts also being shown iii sectioii; l 'is alvertical s ectionf'of the` tool taken'on `:aplaiiethroughthe connectf-- ingA screws which arescrewediint ,thecutterhead; 5 'isv similar section taken on a plane at right langles tothat of' Fighe,

that is to say, lthrough the connecting 5 screws which are` screwedginto theshank ofi` the tool Fig. 61s a" perspeotiveview vof the cutter,head1.` withthe cutters .and retaining ringremovedg' Fig.8 is aperspective view` i. of' f the Y intermediate?v member which forms I i' ASpecification of Letters `1 ateiirtv Patented Allg, 24, 1920;k j lappiibafion 'fiiednay 2l, lwie;l fseriai Nbamiss,

part'of the` Heating connection Vbetween the shank aiidcutterfhead; Fig. 9, is a 'perspecf Y I Y tive viewmof Voiie'oi the cutters g" Fig.n 10 isl a verticalzsection of a modiiedstrncturefin and Fig. 11 is an end 'view of thesame.- Throughout these views like "characters re' l fer to like 'parts` i Referring to the drawings V in'detail; 1 0

designates the shank" which isfprovided with i.; 1 the usual slottedcylinderfll and wear 'plates or holding" memherofithe machine in which 12 forguse in setting the tool in ,ftl'iechuckV l vided byj'cutting' away,jopp'ositefsidesof the cylinder,` 11vso'fas touprovide the opeiispaces j; l 14:; ln this .way access ymay 'be 'had tothe upperside of eacho'ffthese flanges forthe jpurpose of turning' up orv looseningV the.` i 'screws 15"'hy whichtthe inte'riiiediatefmein!v 1 -ber 16 is securedto the cutter head 17.", Each` of the screws l15 passes "freely through an opening l18 'in each of the anges'l." t These A screws do not serve to connect the intermel diate member 16 with'jthe shankj1'0. ThisI latter function is'` performed IbyJscrewsflS) which` pass through the intermediate mem# berf 16 into threaded l engagement y i with threaded openings 2O inthe hanged endoff;` fthesliank l10.v Eachscrew 151. hasa cylinj drical portion; 21 which is smaller in diameterjtha'n' the head of the screw and larger ythan "the" threaded portion 'which enters4 into yist. i 7

the f cutter. head 17.*` The length- 'of this. i

vcylindrical vportion isl slightly greater'than the thicknes'sof the intermediate member 16;

` Where the screw isfreduced in. diameterbetweenV 4the cylindrical Vportion 421 and the threadedp'ortionfa square shoulder 22 is A provided. The screw may he screwed home until this'Vv lshoulder hears tightlyfupcn the v adjacent faceiof Vthe cutter head1? Whenf i the screw isfthusfpositioned a set' screwV 23 inthe ,adjacent wall of lthefcntter Vfhead" 17 may he'screwedagainst the screw 15`to hold Vit'ag-ainst accidental removal. '-Thecyliiidri'-4 4 Acal-shankZl of the screws 15 passes in 7 each instancethrough:Y an'elongated'lhole Qtjin the intermediate' memb`er16.- Byreason of the headof V,the screw and `thele'ngth of the c c i1o Y cylindrical shank lbeing slightly longerjthan Y v i c the thickness'of-themember v16, lthememher'y I 60` V v which the floating feature is not employed;

16 will be free to move relative to the screws and the cutter head 17 to which they are ixed, in the direction'of theelongated slot. In other Words, this construction provides .a pin and slot connection Which allows the cutter head to be lmoved to and 'fro in the Y direetion fofftheholesv 24, thus 'giving the.y

'cutter head a oating Inovementin this direction relative to the memb'e'rg'l.YK This construction does not provide ofthe floating movementbut onlypart ofit as. We shall `Seely `Thebalajnce ofthe .floating movement isfp'revided bythe screws 19 passing throngh Y other "elonlgatedy slots 25 into "vrthreaded enintthepfianged end of theshankf10, as pre-k gageme'nt Withfthe threaded' openings A2,0

Y .viouslyf no'tedff In thisinstaneeeach screw l V19 isprovidedwvith a cylindrical shank 26 yvjhichfis slightlylonger than the thickness ofl themeniber 16J land With'a `shoulder '27 proyidedat' the point'ivliere the shank is redneed to yprqvide.the threaded portion of movement relative "to the shank 1,0 in j the direction vof the openings'l. Frointhizs de- Vscriptiolli; it'ywigll be seeir'thatthe member .116 i l h'a'sf a to and'ro'` movement relative to, the@ A shajnit: 10- and'the'cntter. head 1,7 has a to and. fro movementfelative tothe member. 115.7- 'It will alsofbe .noted that'fthe elongations of the. bales 261 thrQileh ,which 'theserew' l5Y passareV ifnfa .direction at right anwles. to

t'liiitv of the elongation Vof'V the ho es xthe-SlianklzO. .In theirst ofthese extrerrziev cases the' intermediate member16vvill moyefV 'only with refereneeto. the screws' .19 andV in the V.other l of these extreme i eases theintermediate Vmember will' move only with rei,-

through which 4the screvsi As 1a resnlt of thisarrangement the,cntter yhead 17 v'fllflavefa Heating niOr-eielitll ain/'dif'. A reetien in planefit lfright" angles tothe Iaxisoi theslra'nk 10. The movement in one extreme caseJ *.vll be 4that wherein the., cu t.-.

terliealcfl 117 doesl not inoverelativelyto the m'enibeiflbutall ythe movement is` obtained by thel member .'16 moving relatively. to; the

vshank 10'.` The movement-in .the other extremey easewvill. be. one Where-the; cutter heady moves relatively. to the "member lvandthe?V p Y v ,i

'f'..tleted nl1`'gS.. 4f-and; 5; 1TH@ .-fhead oi the Screw 38 isprridedfwtha Go'nialsurfaee: 39 'WhQhIha-s, the; Esame' dnlnaitoli as, .theY f.dllsltlle same i11-V dinatiene-tl1exe0n @Haces 3710.11 the, ew .3.8 salo provided. Y 1

latterj member' does not'l move relatively .to

i erenee .tothe screws 11H5, Between these' ei*- I trfemes the intermediate Y member rkwill move f Withfre-er'ence to both` setsl oi-screvvsfthe Vmovement being {thefresultant of` the comf. ponjent movements of eachjpla-ir.,ofscreivs .4. y.relative to the; intermediate member 16. lIn i assembling.thelpartsg the intermediate mem# .ber .116 SrSt :Seemed in." placent@ the such, for example; as 'iiljlns'trated Witha eylindricals locking them by'set screws `28.V Then the' 'critter `head-17 fsbrouglit into position and,

Vshank lOby screwing down screvvs l9fandf in turn, issecured to thevmember 16 by the t,

To' give space for theheadso-.th'e screws 19 the cutter head1? is-provided lwith cavipass when assembling the( parts.; 'lllrese cavities are large enonghwtojpermit the necessary play 'of the cutter head; 17' relative to the vint'e'rmediate memb 16`Wfiithout-r engagimT with.. 0,1.' SriKiIlgtheQrQWef AnV inspection of the eutterfhead 17 'Will Uien-'the vpartsy are' assembledV this stein 30 31to permittlie elitterhead to move A so show' that itis provided Wllr-a stem 30. Y

freely tothe-.extent perniitted'by'thef elon- I gated openings 24 `and25in the member 14S. Y Tlln'dr Sid@ .di medewer-heed. .l7is Pro` l vided with groovesQ32''n .for the-.reception ol" thefenttersf. Thesegrooves are osuilie 'on" the., other side..

saisi been. abwehren-onduleMeneeri Cutters mer-beesten 'p'r'ferfd 'fnestiuetien Screw. 3S ,extends the. lCutter .head1-an 111.11@ end 0f merope/ning, as A:clearly illustelijsionsge.. The

the tfit isv free :enough-t9.; allowV the. screw to. be readily reeiproeatedwithinvthebushing fig. 59.y 91's; J .110.

55 as heretofore described'. The retainingring4` 42 is held by screws `43 as in the caseof the Y curate movement vof the screw as wellfas ac" screws 43 which passthrough holes inthe I ring 42 into threaded engagement `with corresponding threaded openings in. the vcutter head 17. In assemblingthe parts, thecutters, of course, are placed within the grooves 32 and when the screws'43' are screwed' down tight the vretaining ring i42 presses against the under faces of the cutters 33 and firmly holds them in place. When the ring 42is loose, the cutters v*may be adjusted to any desired width of cut by pushing them inward toward the axis of the tool and then by screwing in the adjustingscrew 38 the.

cutters maybe gradually forced out until the desiredV adjustment is obtained. Then the screws 43 arescrewed downA tight so` as V to cause the ring 42`to securely clamp.` the cutters in place. Then the adjusting screw 38 may be tightened. lVhen so tightened it bears more firmly againstk thel inclined facesl V3(3 of the cutters 33 and provides an abutr ment against which thecutters press when the tool :is in service.

the adjusting screw'38 will .beinoved farther and farther inward and this inward movement may continue until theconical face 39 of thel screw 38 engages'the conical faces 37y of the extensions 34 on fthe' cutterl head.

Whenthis point isreached 'the limit of adjustment is reached andthe cutters mustbe replaced by new ones. n

In the modification-shown in Flgs. 10 and 1l the same cutter head construction is employed but the cutter head 17 is not arranged with an independent stem V30 but is.y v a threaded engagementwith said extensions at points adjacent to the forward walls of said formed directly at the lower end of the l shank lO. In thisway the cutter head is attached to and rigid withV the shank and does not have the floating action of the preferred form of the invention heretofore described.

44 in the shank 10instead-of into an opening in the stem 30. The bushing 4l is arranged the same as in the structure previously de` -scribed and it coperates'in the same way with the shank 40 on the screw 38.

other structure. Itwill be apparent that in carrylng out my invention certain alterations and changes may be made in the parts and theirarranges ment without departing from. the spiritV and scope ofthe invention.- Certain of its features may also be employedin other-forms y of construction. It is my intentlon to cover It will be seenV that as. vthe cutters `wear awayand become shorter,-l

The cutthe-,various modifications and adaptations ybythe terms of the appended claims. 1 Vhat I claim as'new and .desire to secure by Letters Patent of the United States, is: .Y

VL Ab'oring tool having ahead grooved on its under side `with `radial grooves of sizeand shapeA to receive. cutters, said grooves being"` Y their-lower yfaces lying ina common plane, theouter edge of each of said extensions contioned so asto make the forward walls of said located between block-like extensions having y y grooves shorter than the rear wlalls, a retain-'f ing ringpositioned on the underside lof said head adjacent andparallel to the vsaid lower facesgof said extensions,` screws passing through 'said ring into threaded engagement? with said extensions at points adjacent to the forwardl walls of said "grooves to securely clampthe cutters in place, anda' centrally positioned adjusting screw engaging a central 1 threaded opening in-said head and having a cylindrical Vguiding portion fitting intoV a guiding portion of said openingand having a conical portion for engaging the cutters toi rforce them outward'as said screwl is screwed into l.said threadedopening.` A:

2. A boringtool having a head grooved on. f

, its under side withiradial grooves ofsize and shape to l receive cutters, said grooves beinglocated between block-like extensions having. their lower faces lying ina Vcommon plane,fthe outer edge of each of said extensions consisting of a beveled face, s aid faces being positioned soas to make the forward walls of said grooves-shorter than the rear walls, aretaining ring positioned o n the under side of said head adjacent andparallel' to the said lower faces of said extensions, screws passmg through said ring into grooves kto securely clamp the cutters in inV said head and havingagcylindrical guidf ing portion fitting into a guiding portion of said opening and having a conical por tionfor engagingthe cutters vvto forcethem Vvoutward as said screw is screwed into said threadedl opening, said extensions having inner conical surfaces, adapted toV engage the conical surface of said screw to limit the in.

ward adjusting movement of saidscrew.

`3.Al boring tool having a cutter head,

means for adjusting said cutters relative to means forsecuring said member, shank and head together so asto provide alateral play "of said head in allV directions relative to saidA shank;v

12o lmeans for securing the'cutters to said head,y 'v

' saidv head, a shank, an intermediate member between saidV shankf'and cutter head, and

a single adjusting means vpositioned cen-f trally of saidk head. and opera-tive to adjust the cutters relative to said head, a shank, 4an

.intermediate'memberv between' said shank and cutter head, and. meansvfor securing said, member, head and shan'ktogetlfiersovas to provide-aelaterarl play of said-head in; all directions relativeto saidshan'k; y

I, 55A V.boring toolf h'zwng afcutter head,`V`V

means forv securing the: cuttersto vsaid head,- a. single adjusting` means positioned centralfly'of sai'dh'e'adand operativev toadju'st u, 6'. Aboring'tool havinga cutter head pro-l vided. :with radial grooves for receiving radially adjustable' cutters, a central ad] usting-,screw threaded into an opening v1n` said head and having?v its own headv positioned near the lower endav of the tool so as to be readily Vaccessible 'for adjusting purposes, said screw khaving-a1 eonif'eal'face'l for -`engagsaid screw is screwed intosaid head, a shank,

an intermediate member between said shank andcutter head, and means for securing said- -meniber,- shank and'headctogether so as to ing the cutters 'to' move theinoutward as 30 provide alatera'lplay ofsai'd 'head in Vall 3 5 directions; relatjVefto;saidshank."1 f p n 7 A boring ,toolhavi'nga cutter headpro-A v vided: with radial grooves orreceiving.' Y,

radially adjustable? cutter-s; a'. centralf ustingfscrew threaded into an vopeningv in saidV 4o' 'hiea'dV and having its own. headposltioned near the lower end' of thetool so as to be' readily accessible. for Aadjusting purposes, said se'rew having a conical face' for engagingthe cutters-to m'o'vethemA outward as said screw is screwe'dintosaid head, a shank, an

intermedi-atemember 'between said shank 'andv cutter head, means for securing said Vmember to lsaid member witha limited movement relative to'fsaid member 1n: a direction at sub`V i, to sai'dshankwith a limited movement" in one L direction, and means forseeurin'g said head 50Y stantially rightangfl'es to said iirst men` p tioned direction." Y Y' In testimony whereof, lfI hereunto sub-V scribe 'my name this 24th dayof v JACOB VAN-nait vVenir. f "l 

